Electric heater



FIG. 1 is a perspective view of electric heater showing my new design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right end view thereof.

FIG. 5 is a left end view thereof.

FIG. 6 is a top view thereof.

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view of the opened case thereof.

The broken line showing is included for the purpose of illustratingportions of the article and forms no part of the claimed design.

The ornamental design for an electric heater, as shown and described.